Effect of immobilization and configuration on lumbar adjacent-segment biomechanics.
Effect of immobilization and configuration on lumbar adjacent-segment biomechanics.
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DOI：
10.1097/00002517-199304000-00002
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发表时间：
1993-04
期刊：
影响因子：
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通讯作者：
K. Ha;M. Schendel;J. Lewis;J. Ogilvie
中科院分区：
文献类型：
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作者：
K. Ha;M. Schendel;J. Lewis;J. Ogilvie
采用离体犬脊柱，对腰骶部不同角度制动后相邻节段的运动和关节突载荷变化进行定量分析。在屈曲、伸展和侧弯下检查变化。增加（扩展：62%;屈曲：85%;左弯曲：百分之三十;在制动后的所有运动中，相邻节段的运动均为右弯曲（26%）。相邻节段关节面载荷在任何载荷状态或固定配置下保持恒定。对于所有配置，关节面接触部位在伸展时撞击，在左弯曲时保持不变，在右弯曲时向上移动。本研究表明，固定后，相邻节段的小关节接触模式发生变化，载荷不变，当腰椎再现相同的运动范围时，节段运动增加。固定化片段的配置对这些变化没有影响。
The motion and facet load changes at the adjacent segment after lumbosacral immobilization (with different angles) were quantified in vitro using canine spines. Changes were examined under flexion, extension, and lateral bending. An increase (extension: 62%; flexion: 85%; left bend: 30%; right bend 26%) in motion at the adjacent segment was found for all motions after immobilization. Adjacent-segment facet load remained constant under any load state or immobilized configuration. For all configurations, the facet contact site impinged in extension, remained unchanged in left bending, and moved superiorly in right bending. This study has shown that after immobilization the facet contact patterns at the adjacent segment changed, load was unchanged, and segmental motion increased when the lumbar spine reproduced the same range of motion. The configuration of the immobilized segments had no effect on these changes.